Frame embroidery machine



Oct. 17, 1939.

K` SCHEIBEL FRAME EMBROIDERY MACHINE Filed Aug. ll, 1957 A2 sheets-sheet 1 Oct. 17, 1939.

K. scHElBEL 2,176,547

ITRAME EMBROIDERY MACHINE Filed Aug. 11, 193'/ 2 sheets-sheet 2 FlgO y F /`q.1l

32a OO OOOOO Gro/Vey Patented Oct. 17, 1939 y UNITED STATES PATENT OFFICE 2,17 6,547 FRAME ElYlBROID'ERY MACHINE Kurt Scheibel, Dresden, Germany, assignor to Wrker, Dresden, Germany Application August 11, 1937, Serial No. '158,599 In Germany September 3, 1936 21 Claims. (C1. 112-86) The present invention relates to an improve- T-shaped levers. These pawls are also operated ment in the frame embroidery machine described by the plates. It is however also possible in lieu in Patent No. 2,050,780 granted August 11, 1936. of employing separate locking pawls to anchor the While in the arrangement described in the said levers by means of the plates themselves. prior patent on the setting of the totalling member As the plates take part in the reciprocating 5 (means for adjusting the amount oi displacement movement of the carriage they are themselves of the frame) with the aid of the plate needles a separate from the plate needles which are mountlarge number of intermediate members for the ed in the frame. setting of the totalling member according to the The carriage itself is formed as a coupling design are necessary between the plate needles member between pivoted levers and consequently 10 and the totalling member, the number of these guide tracks, which are more dilicult and more intermediate members in the present arrangement tedious to produce than links and bores, are is considerably reduced. avoided.

This result is attained in accordance with the Ihe arrangement is operated by means of a invention by this that the plates set by the known drive whieh'is so arranged that the crank 15 jacquard card are themselves movably mounted and therewith the levers and carriage remain at on the carriage and provided with projections rest on setting of the plates. which according to the setting of the plates come AS 'in the present deVCe the leCDIOCatng into engagement with levers on the Carriage movements of the carriage coact with the levers movement in the one direction and the totalling Which C011t101the Setting 0f the totalling member, 20

member is operated by the resulting lever movethe eXaCt Setting 0f the emblOdeFY frame depends ment. essentially on the exactness with which the car- In the embodiment illustrated the levers are rage is guided t0 and fr0- T-shaped and mounted on a @Ommen axis, The When in consequence inexactitudes occur in the arms of the T-shaped levers are so directed that displacement of the carriage these act also on the 25 they extend away from one another. They ensetting 0f the embrOdeIY frame. gage in the totalling member which is mounted in In order to exclude such want of exactness or the arm oi one ofthe T-levers, to keep it within serviceable small limits it is By this arrangement it is possible with slight I'eCOmmended t0 displace the Crank arm which swinging movements of the levers to elect a eomengages in the carriage not directly by means of a 30 paratively large displacement of the totalling known drive but to interpose between the carriage member. In addition there is the possibility of and the Cam'diso a toggle lever which is so armovng the levers in the same 0r in Opposite direcranged that its extended position lies parallel to tions and thus of obtaining in a simple manner the direction of reciprocation of the carriage or different settings of the totalling member. coincides with it. As the te and fro movements of the carnage In this Wav any lack of eXactnesS which may are small the speed with which the carriage be OI eXamlJle in the Cam guide and may result moves to and fro can also be kept smalL In due to wear cannot become noticeable in the reconsequence accelerating and retarding shocks CDIOCatIlg mOVeHlel'lt 0f the Cartridge but these 40 in the machine are avoided- The operation 0f inexactitudes are expressed in more or less great 40 the machine is therefore extraordinarily silent bending movement 0f the tOggle. Even when although it operates at higher speed than the arthese ineXaCtitudes are comparatively great a rangement described in the said prior patent, hardly noticeable diierence will occur in the di- The arrangement can be such that the movement reCtOn 0f movement of the carriage and'there- 4.5 of the T-shaped levers is initiated by means of fore the interposition `of the toggle lever tends the projections on the plates. The levers are eneven with long operating DeOdS t0 ptOVde greet gaged in projections on the carriage and are exactitude in the movement of the carriage.

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moved thereby in its movement. 'I'hus it is possi- One embodiment of theinvention is illustrated ble to avoid unnecessary strains on the plates and in the aeeemlenyng dI'eWngS. to make them' light so that a reduction in weight Fig. 1 shows in elevation the construction of the 50 of the reciprocating parts is obtained. device.

In order to ensure uniform position of the Fig.-2 is a plan view of Fig. 1. totalling member the levers are anchored in their Fig. 3 shows essentially the same device as in normal position. This anchorage is effected by Fig. 1 with a toggle lever lnterposedin the drive means of pawls which prevent swinging of the of the carriage. y u55 Figs. 4 and 5 show the T-shaped levers lying behind one another in Fig. 1.

Figs. 6 and 'l show the plates disposed behind one another in Figs. 1 and 2.

Fig. 8 shows the totalling member partly covered in Fig. 1.

Fig. 9 shows the carriage.

Fig. l0 shows diagrammatically a setting of the totalling member in which the downwardly extending T-shaped lever has retained its central position and the upwardly projecting T-shaped lever is swung to the right.

Fig. 11 shows in diagrammatic form the setting of the totalling member in which the upwardly extending lever has maintained its middle position and the downwardly extending lever has swung to the left in the direction of Fig. 1 1.

In Fig. 12 is shown a setting of the totalling member in which the upper lever is swung to the right and the lower lever to the left.

Fig. 13 shows a setting of the totalling member in which both levers have swung to the left.

In the present invention as in the prior patent the embroidery frame is displaced in the movement of the reciprocating carriage. By the carriage movement the T-shaped levers are displaced and according to their setting there is a particular position of the totalling member. On the movement of the carriage in the one direction the totalling member is swung out of its normal position and on the movement of the carriage in the other direction the totalling member is again returned to its normal position. The amount by which the totalling member is moved out of its normal position determines the amount of displacement of the Vembroidery frame.

The displacement of the levers which influence the position of the totalling member is eected by means of plates which in known manner are displaced by plate needles. On one lever act two plates. Since two levers are necessaryV for one totalling member, four plates are required for the one totalling member. Y Y

In the frame I of the machine the levers 2 and 3 are rotatably mounted at Y4 and 5. Both levers 2 and 3 engage in the carriage (Fig. 9) by means of pins at 6 and 'I in such manner that the carriage becomes the coupling member. The swinging to and fro of this coupling member is eiected by means of the cam disc 8 which is xed on the driving shaft 9 and according to its path moves up and down a pin I0 projecting into the same which pin is mounted on the lever 3.

The carriage II (Fig. 9) is also swung to and fro according to the movement of the lever 3 and in its movement carries therewith the parts mounted thereon. These consist of the plates I2 and I3 (Figs. 6 and 7) They are guided in guide tracks I4, I4a, Mb; I4c of the carriage 4and can be displaced in the guide tracks b-y the plate needles I5 and I6 by means of the jacquard card Il.

rIfhese plates have separate projections I2, I2a, I3, E3B; and recesses which co-operate with corresponding projections on the T-shaped levers I8 and I 9. If for example as shown in Fig. l, the plate I2 is displaced to the right its projection I2a comes over the projection i860 'of the T- shaped lever I8. Up and down movement of the carriage is so controlled by means'of the camdisc that at the moment of displacement of the plates the carriage remains at rest. If after displacement of the plate I2 into a position in which the Aprojections I2a and I8a are in register the carriage is moved, the projection I2a comes against the opposite part I8a of the lever I8. This is rotatable about the pivot 20 in the frame. On downward movement of the carriage the projection ISU is swung to the right as indicated diagrammatically in Fig. 10. No change is made in the position of the T-shaped lever I9 on co-operation of the parts as shown in Fig. l0.

The lever I8 has at its upper end a. pivot 2l which engages a recess 22a in the totalling member 22. The totalling member 22 is rotatably mounted at its bore 23 on a pivot pin 24 of the lever I9. The position of the totalling member is thus dependent on the position of the pivots 2I, 2d of the T-shaped levers i8, I9 as shown diagrammatically in Figs. 10 to 13. In this diagrammatic illustration is shown how the totalling member with its pivot 25 can be brought from Zero position into four different positions which lie on one side of the zero position. The symmetrical positions of Figs. 10 to 13 are possible and accordingly four other positions of the pivot 25 of the totalling member.

The totalling member must in order to be capable of assuming the diierent positions have a recess 60 in which the pivot 253 lies about which pivot the two levers I8, I9 rotate.

The form of the plates is so selected that on their displacement only the projection IEa or ISU of the lever I8 comes in engagement with a corresponding projection on a plate. In other words the one plate-in Fig. 1 the front plate-serves only to turn the lever I8 in clockwise direction and the other rear plate in the opposite direction. A safety device must be provided so that both plates are not displaced simultaneously such movement ofthe levers I8, I9 can take place only in one direction. In order to displace a lever two plates are thus necessary. As the setting of the totalling member makes two levers necessary there must be present for the two levers two pairs of plates such as shown in Fig. 2.

In order to obtain exact embroidery work a precise setting of the totalling member is necessary. T-shaped levers I8 and I9 are therefore anchored in their normal position. For this purpose locking pawls 26, 2l lare used. Locking pawl 26 engages from beneath under the projecting part or" the stopV |80. and the locking pawl 2l bears from above also against this part I 8a. Both locking pawls are rotatably mounted on the frame on an axis 29. lIhey are operated by the plate movement and engage for this purpose with pins 3, 39 in recesses 3l, 3i' provided in the plates. These recesses are so formed that on the downward movement of the carriage and the downward movement of the pin 3U can slide within the recess 3l Vwithout displacement of the locking pawl 25 taking place.

YWhen however the plates are horizontally displaced in the carriage operation of the locking pawls 28, 2l' is `eiected in such manner that the plate which rotates the lever I3 in clockwise direction also releases the locking pawl 26, which in the engaged position prevents rotation of the lever in this direction. In the same manner the other plate which produces rotation of the lever in counterclockwise direction, releases the locking pawl 2l which prevents rotation of the lever I8 in this direction.

The conditions in connection with the lever I9 are exactly the same as with the lever I 8. The plates and locking pawls are formed in the same manner and operate in the -same manner. As they lie behind one another they are not visible in Fig. 1.

In the 'foregoing description it is explained the plates thereby produced,

how the rotary movements of the levers I8, I9 are operated through the medium of the plates. The plates bear with their projections on the corresponding opposing projections on the levers I8 and I9 and on downward movement of the carriage being initiated the plates will then lie with their projections on the opposing projections of the levers and rotate them. The displacement of the levers is effected in this manner.

In order to keep small the parts reciprocating with the carriage, the plates are made light. In the foregoing embodiment they only initiate movement of the levers I8 and I9. In this movement the levers position the correspondingly shaped projections or lugs 32, 32', 33, 33 which cooperate with the projections 34, 35 of the carriage. When engagement is effected the carriage takes charge of the rotation of' the levers.

As already explained above by the displacement of the levers the totalling member with its pivot 25 is brought into definite position (Fig. 13). When the carriage then begins its rearward movement again the totalling member is returned to normal position. According as it has been moved into the position I, 2, 3 or 4 (Fig. 13), the return movement into normal position differs. This return movement of different amount into normal position is transmitted to the connecting rod 36 and this again transmits it to the double armed lever 31 which swings about the pivot 38 and on its free end carries a toothed segment 39.

According to the amount of swinging movement of the pivot 25 of the totalling member the toothed segment 39 will be given a rotary movement of different amount about the pivot 38, on return of the totalling member into its normal position again.

When the totalling member has moved out of normal position this toothed segment 39 is moved out of engagement with the pinion 48. On the return movement of the totalling member into its normal position it is however in engagement with the pinion 48. For this purpose the pivot 38 of the toothed segment is connected to a bell crank lever 4I which can turn about the axis 42 xed in the frame. It carries a pin 43 which engages in a cam track 44 provided on the cam disc 45. The cam disc 45 is mounted on the axle 43 which is mounted in the frame and is driven in any known manner.

The cam track 44 is so formed that it produces a reciprocating motion of the pin 43 about the pivot 42, which produces an up and down movement of the axis 38. The toothed segment 39 is thus alternately coupled and uncoupled from the pinion 48.

The rack bar which effects displacement of the embroidery frame is displaced by the pinion 48. It is therefore clear that for exact displacement of the embroidery frame, unnecessary play in the pinion 48 must be avoided. Therefore care is taken that when the toothed segment 39 is released from engagement, the pinion 48 is locked. For this purpose the locking pawl 41 is provided which has a locking tooth lla which locks the pinion 48. This locking pawl 4'! can turn about the axis 48 fixed in the frame. It is also formed as a bell crank lever which carries a pin 49 at its short end. This pin 49 engagesin a cam track 58 which is also provided on the cam disc 45. The two cam tracks 44' and 58 are so determined with respect to one another that the locking tooth 41a locks the pinion 48 at the moment when the toothed segment 39 is disengaged. At the moment however at which the toothed segment 39 comes into engagement again with the pinion 48, the locking pawl 41a releases the pinion 48.

As the setting of the totalling member is effected by means of levers comparatively small swinging movement of the levers can effect a large displacement of the totalling member. The rotation of the levers is produced by the reciprocating movement of the carriage which corresponding to the small rotary movement which is imparted to the levers is also kept within reasonable limits. As an advantage of the small movement of the carriage, small movements of mass are produced and therefore the device can operate at high speed. On the other hand the small movement of the carriage which is transmitted on the displacement of the frame into a large one requires precise movement of the carriage. Unnecessary play in the carriage must therefore in all cases be avoided and care must be taken that such undesired play does not occur when the device has been for a long time in operation.

Lack of exactness merely can be caused by wear of the cam tracks which effect the raising or lowering of the lever arm 3 (Fig. l). In Fig, 3 is shown a construction in which a toggle lever i is interposed in front of the crank arm. It is actuated by means of the connecting rod 53 and the bell crank lever 55 rotatable about the axis 54 fixed in the frame. The cell crank lever 55 carries at its free end a pin 53 which Iengages in a cam track 5'! in the cam disc 58 which is rmly connected with the axle 59 .rotatably mounted in the frame. The axle 58 is driven, e. g. in any known manner. When the cam disc 58 rotates there is imparted to the bell crank lever 55 an oscillating movement about its pivot 54 and thereby the connecting rod 53 is also driven and from it the toggle lever 5I, 52. The dotted lines in Fig. 3 show the position of the toggle lever in retracted position and the full lines in the extended position. If now in consequence of wear of the parts which displace the toggle lever, the toggle lever 5 I, 52 is swung over its dead point position or is moved not quite to its dead point position, variations in this position are hardly noticeable at the crank arm 3. The arrangement of the toggle lever in front of the crank arm so that the extended position of the toggle lever lies parallel to the direction of reciprocation of the carriage serves also to decrease the inexactness of movement of the carriage and to render harmless wear which. might occur with long use. v

The toggle lever link also relieves pressure on the cam drive and prevents any premature wear. This means can also therefore be employed for the operation of other driving means.

I claim:

l. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame comprising a carriage, means for reciprocating said carriage, plates mounted upon said carriage, means cooperating with a jacquard card for setting said plates, levers actuated by said plates and a totaling member set in accordance with the actuation of said levers whereby the amount of displacement to be given the embroidery frame is determined.

2. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame Comprising a carriage, means for reciprocating said carriage, plates mounted upon said carriage, means cooperating With a jacquard card for setting said plates, levers pivoted at a fixed point actuated by said plates and a totaling member set in accordance with the actuation of said levers whereby the amount of displacement to be given the embroidery frame is determined.

3. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a movable carriage, plates mounted upon said carriage, means cooperating with a jacquard card for setting said plates, levers actuated by said plates and a totaling member set in accordance with the actuation of said levers whereby the amount of displacement to be given the embroidery frame is determined.

4. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame comprising four Way motion elements cooperating with the jacquard pins and being set thereby and a totaling member set in accordance with the setting of said elements by said pins whereby the amount of displacement to be given the embroidery frame is determined.

5. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement or the embroidery frame comprising four way motion elements cooperating with the jacquard pins and being set thereby and a pivotally mounted totaling member set in accordance with the setting of said elements by said pins whereby the amount of displacement to be given the embroidery frame is determined.

6. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame comprising four Way motion elements cooperating with the jacquard pins and being set thereby, movable levers actuated by said elements and a totaling member actuated by said levers whereby the amount of displacement to be given the embroidery frame is determined.

7. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame comprising four way motion elements cooperating with the jacquard pins and being set thereby, movable levers actuated by said elements and a totaling member pivotally mounted on said levers actuated by said levers whereby the amount oi displacement to be given the embroidery frame is determined.

8. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame comprising horizontally slidable plates, means lor vertically reciprocating said plates, means cooperating with a jacquard card for setting said plates horizontally, levers pivoted at a xed point cooperating with said plates upon the vertical reciprocation of said plates and means cooperating with said levers for determining the displacement to be given to the embroidery frame.

9. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising horizontally slidable plates, means for vertically reciprocating said plates, means cooperating with a jacquard card for setting said plates horizontally, levers pivoted at a iixed point cooperating with said plates upon the vertical reciprocation of said plates and a pivoted member cooperating with said levers for determining the displacement to be given to the embroidery frame.

10. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a movable carriage, movable plates upon said carriage having projections thereon, pivoted levers actuated by said projections and a totaling member set by said levers whereby the amount of displacement to be given to the embroidery frame is determined.

11. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a movable carriage, plates slidably mounted on said carriage, means cooperating with a jacquard card for setting said plates, T shaped levers mounted on a common shaft cooperating with said plates and means c0- operating with said levers for determining the amount of displacement to be given to the embroidery frame.

l2. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a movable carriage, plates slidably mounted on said carriage, means cooperating with a jacquard card for setting said plates, T shaped levers mounted on a common shaft cooperating with said plates, a totaling member cooperating with said levers and means cooperating with said totaling member for displacing an embroidery frame in accordance with the setting of said totaling member.

13. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising slidable plates actuated by the jacquard pins, levers mounted upon a common shaft cooperating With said plates, a totaling member pivotally mounted at spaced points in adjacent levers and means cooperating with said totaling member for displacing an embroidery frame in accordance with the setting of said totaling member.

14. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a carriage, means for reciprocating said carriage, plates slidably mounted in said carriage adapted to be set by the jacquard pins, T shaped levers having oppositely directed arms cooperating with said plates and a totaling member pivotally mounted in arms of said T shaped levers whereby a displacement of the embroidery frame may be secured in accordance with the setting of said totaling member.

15. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising movable plates adapted to be set by the jacquard pins, said plates having projections thereon, pivoted levers adapted to cooperate With said projections, means for locking said levers except when actuated by said projections and a totaling member cooperating with said levers whereby the amount of displacement to be given to an embroidery frame is determined.

16. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a carriage, means for reciprocating said carriage, slidable plates upon said carriage adapted to be set by the jacquard needles, said plates having projections thereon, pivoted levers cooperating with said projections so that initial movement is imparted to said levers by said projections, means upon said carriage cooperating with said levers after initial movement has been imparted thereto in order to positively move said levers and a totaling member set by the movement of said levers Whereby an embroidery frame may be displaced in accordance with the setting of said totaling member.

17. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a series of slidable plates adapted to be set by the jacquard pins, a series of pivoted levers cooperating with said plates, a totaling member actuated by said levers which determines the amount of displacement to be given to an embroidery frame and means for locking the plates of said series of plates not actuated by the jacquard pins.

18. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a reciprocating carriage, slidable plates adapted to be set by the jacquard pins mounted upon said carriage, movable levers cooperating with said plates, a totaling member actuated by said levers whereby the amount of displacement to be given to an embroidery frame is determined and means actuated by said plates for locking said levers.

19. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a carriage, a pivoted lever to which said carriage is. pivotally connected, a cam for oscillating said lever whereby a reciprocating motion is given to said carriage, slidable plates mounted upon said carriage adapted to be actuated and set in predetermined position by the jacquard pins and a totaling member adapted to be set in predetermined position by the setting of said plates whereby a displacement of an embroidery frame may be secured in accordance with the setting of said totaling member.

20. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a carriage, a toggle link mechanism for reciprocating said carriage, sliding plates mounted upon said carriage adapted to be set by the jacquard pins in accordance With a predetermined `design and means cooperating with said plates for determining the displacement to be given to an embroidery frame.

21. In an automatic mechanism for embroidery machines, a mechanism controlled by a jacquard card for determining the displacement of the embroidery frame, comprising a carriage, a pivoted link to which said carriage is pivotally connected, a toggle link also pivotally connected to said link, cam means for actuating said toggle link whereby a reciprocatory motion is given to said carriage and means determining the displacement to be given to an embroidery frame cooperating With said carriage.

KURT SCHEIBEL. 

